PRICING NOTICE: Proposal to discontinue the Fastmarkets Wyoming bentonite price

By William Clarke
Published: Tuesday, 16 February 2021

Fastmarkets proposes to discontinue its assessment of the price for Wyoming bentonite due to low volatility and the grade’s lack of relevance to the global drilling mud market.

The price assessment under consultation for delisting is the following:

MB-BEN-0003 Bentonite (all grades), crude, bulk, rail hopper cars, exw Wyoming, $ per short ton

Quality: Crude, bulk

Quantity: Min 100 short tons

Location: Ex-works Wyoming, US

Timing: Spot

Unit: $ per short ton

Payment terms: Within 30 days

Publication: Last Thursday of every month

Notes: Bulk rail hopper cars

Feedback from market participants during informal consultations suggested that there was little need for a Wyoming bentonite price, given the wide range of alternative muds in the onshore US drilling market, and the range of other bentonite sources in the global market.

The low-value, high-volume nature of Wyoming bentonite meant that prices paid by drillers were not closely correlated to the ex-works price.

In addition, bentonite prices have shown low volatility compared with other drilling inputs.

Fastmarkets will continue to cover oilfield mineral markets with its range of barite and frac sand prices.

The consultation period for this proposed amendment will end one month from the publication of this pricing notice, on Monday March 15, while the amendment will be made, subject to market feedback, on Tuesday March 16.

To provide feedback on this proposal, or if you would like to provide price information by becoming a data submitter to this price, please contact William Clarke by email at: Please add the subject heading 'FAO: William Clarke, re: bentonite prices.’

To see all Fastmarkets’ pricing methodology and specification documents, go to

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